3645785 has 16 divisors (see below), whose sum is σ = 5140800. Its totient is φ = 2447040.

The previous prime is 3645781. The next prime is 3645791. The reversal of 3645785 is 5875463.

It is not a de Polignac number, because 3645785 - 2² = 3645781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3645781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1835 + ... + 3264.

It is an arithmetic number, because the mean of its divisors is an integer number (321300).

Almost surely, 2^3645785 is an apocalyptic number.

It is an amenable number.

3645785 is a deficient number, since it is larger than the sum of its proper divisors (1495015).

3645785 is a wasteful number, since it uses less digits than its factorization.

3645785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128.

The product of its digits is 100800, while the sum is 38.

The square root of 3645785 is about 1909.3938828854. The cubic root of 3645785 is about 153.9088824006.

The spelling of 3645785 in words is "three million, six hundred forty-five thousand, seven hundred eighty-five".